Home / 15,031.55-20,739.80-9,719.97

Finding the Fourth Proportional to 15,031.55, 20,739.80 and 9,719.97

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Solution

The fourth proportional to 15,031.55, 20,739.80 and 9,719.97 is: 13,411.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,031.55 : 20,739.80 = 9,719.97 : x
  2. Step 2: Convert to fraction form
    15,031.55/20,739.80 = 9,719.97/x
  3. Step 3: Cross multiply
    15,031.55x = 20,739.80 × 9,719.97
  4. Step 4: Simplify right side
    15,031.55x = 201,590,233.81
  5. Step 5: Solve for x
    x = 201,590,233.81/15,031.55
  6. Step 6: Final answer
    x = 13,411.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.